To: atm{at}shore.net
From: Jim Burrows 
Reply-To: Jim Burrows 


At 22:35 2003-07-02 +0530, Ulhas Deshpande wrote:

>The SixTests file is below:
>Test 211
>203.0 0.0 Mirror, obstruction diameters (mm)
>Foucault
>0.0 Source distance (0=moving source)
>y, mm X, mm
>    24.6  2518.292
>    39.5  2518.546
>    56.8  2519.213
>    71.6  2519.657
>    84.1  2519.943
>    95.8  2520.641
>Some how the saved Setup file does not seem to have the result. But I am
>sure the wizards in the group will be able to use this data and guide me
>further.
>NOW I plan to go with a small tool on the high zone at 60mm rad to bring
>down the ridge and at 80 mm to shorten the edge.

You need to add 4 lines to the end of the file:
---------------------------
*
-1 0
0
0
-----------------------------
i.e., end of data, parabola target, no error estimate, zero reading bias. 
Sixtests says the best-fit parabola has R = 2518.565, RMS = 17.1 nm, .858
Strehl.  You could quit now...oops, it's a cass primary; better touch it
some more to reduce the secondary requirements.  Sixtests agrees with the
dual-humped camel back.

As a fun alternative to the (dangerous, tedious) small tool effort, I
shortened the target parabola radius by .2 mm, which raises the center
deviation and reduces the TDE, and read the surface deviations into
Star_lap.  I'll attach a picture of the resulting deformed lap to a copy of
this post to Ulhas.

         -- Jim Burrows
         -- mailto://burrjaw{at}earthlink.net
         -- http://home.earthlink.net/~burrjaw
         -- Seattle N47.4723 W122.3662 (WGS84)

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